Question: What is a significant event that Matthias Corvinus was apart of and  what was the location of that event?
Paraphrase: What major event is Matthias Corvinus known for and where did this event take place?
SPARQL (Wikidata): SELECT ?value1 ?obj WHERE { wd:Q188634 p:P793 ?s . ?s ps:P793 ?obj . ?s pq:P276 ?value1 . }